| 词条 | Collema nigrescens |
| 释义 |
| image = | status = | status_system = | regnum = Fungi | divisio = Ascomycota | classis = Lecanoromycetes | ordo = Lecanorales | familia = Collemataceae | genus = Collema | species = C. nigrescens | binomial = Collema nigrescens | binomial_authority = }} Collema nigrescens is a leafy (foliose) jelly lichen (Collema genus) found growing on the bark of trees such as bigleaf maples, in wetter coastal parts of California.[1]{{rp|34, 36}} It is commonly called button jelly lichen or bat's wing lichen.[1]{{rp|34, 36}} It is blackish-green when wet, and dark brownish-green to dark olive when dry.[1]{{rp|34, 36}} The photosynthetic partner is the Nostoc cyanobacterium that is spread throughout the thallus (main body part).[1]{{rp|34, 36}} Although foliose in form, like all jelly lichens, the thallus is not differentiated, lacking layers or an upper or lower cortex (lichen) and the cyanobacteria is spread throughout the thallus.[1]{{rp|34, 36}} It has dark purple-brown apothecia all over.[1]{{rp|34, 36}} It produces no reaction to lichen spot tests.[1]{{rp|34, 36}} References1. ^1 2 3 4 5 6 Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, {{ISBN|978-0-300-19500-2}} {{Taxonbar|from=Q10571792}} 2 : Lecanoromycetes|Lichens |
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